Question about 1994 Chevrolet S-10

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Vent selector inop

The ventilation selector on my 94 s-10 will only select defrost or off. Will not go to floor, vent etc. What is a possible solution

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  • michael_legl May 20, 2009

    That was the problem (hose was off at the vacuum canister). Thanks for the help

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  • Chevrolet Master
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U have either lost the vacuum to the mode selector switch (in the dash control) or the vacuum mode selector switch is leaking in the ac/heater control in the dash, u can usually hear a hiss if it is leaking. the vacuum source is the engine, a small hose runs through the firewall on the passenger side to the switch from the eng vacuum source.

Posted on May 19, 2009

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My 2002 saturn l200 will only blow out air from the defrost vents any idea what could be the problem


These selectors are controlled by the Car's vacuum. Sounds like a vacuum diaphragm that controls Floor/defrost/ etc might be broken. Or you have a slight vacuum leak.

Jun 18, 2015 | 2002 Saturn L-Series

1 Answer

MY DISTRABUTION DIAL FOR DEF.,VENT, ETC IS IN DEFROST AND WON'T CHANGE. THE DIAL TURNS BUT NOTHING CHANGES. I NEEN SOME ADVICE ON WHAT TO DO TO FIND PROBLEM AND FIX. THANKS GENO


Here is the info. I hope the pictures show up. please rate assistance. thx.

Air distribution within the vehicle is determined by the function selector switch position. Two airflow mode doors are used to direct airflow within the heater core and evaporator core housing. The function selector switch/cable assembly is used to position these airflow mode doors. Refer to Section 412-00 for description and operation of each of the system functions.
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Function Selector Cable Assembly
The function selector cable assembly moves the airflow mode doors to the desired position using a 2-sided pull-pull type cable assembly. The function selector controls the cable movement. The end of the cable assembly attaches to the airflow mode door/temperature blend door actuating assembly which transfers the cable movement to the 2 airflow mode doors.
An electrical switch is incorporated into the function selector to notify the A/C switch assembly if DEFROST or FLOOR/DEFROST is selected. When DEFROST or FLOOR/DEFROST is selected, the A/C switch assembly will disable the RECIRC request button and send an A/C request to the powertrain control module (PCM) regardless of the A/C request button indicator ON/OFF status.
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SECTION 412-01: Climate Control 2005 Focus Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 02/25/2004
Function Selector Switch adobe.gif Printable View (173 KB) Removal and Installation
  1. Remove the 4 bolts and position aside the lower steering column cover.
    a0093241.jpg
  1. Remove the function selector knob.
  1. Remove the center instrument panel finish panel.
    • Disconnect the cigar lighter electrical connector.
    a0093247.jpg
  1. Detach the function selector switch.
    1. Disconnect the electrical connector.
    1. Remove the screw and detach the function selector switch.
    n0037059.jpg
  1. Detach the function selector cable and remove the function selector switch/cable assembly.
    e0000109.jpg
  1. To install, reverse the removal procedure.

Aug 04, 2011 | 2005 Ford Focus

1 Answer

Why won't my heater shut off? I can dial the fan down to the lowest blower setting, but it won't shut off at the Off button. The temp. is therefore set at 83 degrees. The modes work i.e., floor, defrost,...


If the ventilation system is set on any setting other than off (I'm talking about the vent, heat, defroster, ac, etc) the fan motor will automatically run at low unless yo select a higher setting. To get the fan OFF, turn off the ventilation system by selecting OFF.

I trust this response answers your question ...

Thank you for your interest in FixYa.com

Mar 02, 2011 | 1999 Oldsmobile Intrigue

1 Answer

1981 corvette air conditioner ventilation


hi

this is because
1.there is some blockage in the line comin up and to sides.
2.the selector switch is not properly functioning. the flaps got stuck and it may allows only air to pass through the floor vents.


please vote me if my answer was useful to you.

Jul 12, 2010 | 1981 Chevrolet Corvette

1 Answer

My AC air registers only have air coming out of the defrost ducts


In every car, there are fins or flaps inside the dash that rotate that distributes the air flow from the blower to the desired opening, ie defrost, floor etc... This flap is controlled by a linkage which is connected to the selector switch. It may be the linkage is no longer connected, or the fins inside the dash are stuck. If the selector switch moves freely with little or no resistence its possible the linkage is no longer connected, otherwise the flaps need to be physically looked at.

Aug 09, 2009 | 1989 Ford F 150

1 Answer

Ac and heat will not blow threw vents just floor and defrost


Sounds like your selector switch is messed up to select where you want the flow of air to go. When you turn the switch to where you want the air to go does it work on floor and when you turn the switch to vent it doesn't?

Jul 11, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

HVAC vent selector does not function. Air flow is


THe blend door seems to be stuck. When you change settings from defrost to floor air or, vent, the blend door opens and closes directing the air to the place you want it to go to. I have had some success spraying a lubricating oil such as WD40 under the dash on the blend door. You need to get under the dash with a flashlight to locate it. It looks like a flap. Spray it with a couple of shots of the WD40. Go easy on the spraying as you may be inhaling the fumes. Keep the doors and windows open to minimize the fumes. Wait about 1/2 hour and try the A/C functions. (defrost, floor, vent air)

Mar 09, 2009 | 2002 Buick Rendezvous

1 Answer

Fan selector does not work


there is a vacuum leak in the vent system... look under the dash and you will see the vacuum hoses ..listen for a leak... also near the brake booster in the engine compartment you will see a plastic cannister about the size of a film cannister... most likely white... that may be unhooked or need replacement.

Robert

Please take a moment to rate this solution.. thanks

Jan 28, 2009 | 2001 Jeep Grand Cherokee

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